/Engine/Plugins/Runtime/GeometryCache/Source/GeometryCache/Public/GeometryCacheSceneProxy.h
Get the MeshData for a given SampleIndex
true if the MeshData was retrieved successfully
virtual bool GetMeshData ( int32 SampleIndex, [FGeometryCacheMeshData](API\Plugins\GeometryCache\FGeometryCacheMeshData) & OutMeshData )